Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach
Recently, H2 enrichment for combustion and emission control in internal combustion engines, gas turbines, industrial boilers, and furnaces has been extensively studied. However, H2 enrichment for various inlet designs to change combustion characteristics has not yet been studied. In this study, the...
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Elsevier
2025-03-01
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| Series: | International Journal of Thermofluids |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666202725000606 |
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| author | Arithra Debnath Prithu Kazi Mostafijur Rahman Md.Rhyhanul Islam Didarul Hasan Saharaj Md Sabbir Hossain |
| author_facet | Arithra Debnath Prithu Kazi Mostafijur Rahman Md.Rhyhanul Islam Didarul Hasan Saharaj Md Sabbir Hossain |
| author_sort | Arithra Debnath Prithu |
| collection | DOAJ |
| description | Recently, H2 enrichment for combustion and emission control in internal combustion engines, gas turbines, industrial boilers, and furnaces has been extensively studied. However, H2 enrichment for various inlet designs to change combustion characteristics has not yet been studied. In this study, the effect of hydrogen enriched air and methane non premixed combustion on dynamic flow behavior, temperature, pollutant emission are investigated in geometries with two distinct inlet arrangements using ANSYS Fluent CFD software. A reduced version of GRI-Mech 3.0 methane chemistry reaction including 19 species was used in the study. Hydrogen was added to methane fuel (CH4) at the inlet within the range 0∼50 % by mass while the mass flow rate of fuel is constant. The findings indicate that as the H2 enrichment increases, there is a noticeable shift in the peak temperature towards the fuel inlet. Additionally, the overall temperature of the combustion chamber remains homogenous indicating flame stability and consistent combustion in both geometries. The addition of 50 % H2 resulted in a reduction of approximately 37 % in the outlet temperature. Besides, H2 enrichment led to lower CO and CO2 emissions in both geometries, which is up to 99.99 % reduction in CO and 88.47 % reduction in CO2 for 50 % H2 addition. The lower emission of CO and CO2 could be attributed to the facts that with H2 enrichment the carbon content in the fuel stream decreases, mixture becomes leaner and subsequently results in more complete combustion. In both inlet configurations, the emission of NO exhibited a slight decrease upon the introduction of 15 % H2 but beyond 30 % enrichment there was a notable increase in NO production, primarily attributed to the peak temperature zones. In comparison, the second inlet arrangement has produced lower CO and CO2 emission than the first one, while the first inlet arrangement has resulted in overall lower NO emission. |
| format | Article |
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| institution | Kabale University |
| issn | 2666-2027 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
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| series | International Journal of Thermofluids |
| spelling | doaj-art-c316156352464ee9a65e108a14d275b02025-02-06T05:12:50ZengElsevierInternational Journal of Thermofluids2666-20272025-03-0126101112Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approachArithra Debnath Prithu0Kazi Mostafijur Rahman1Md.Rhyhanul Islam2Didarul Hasan Saharaj3Md Sabbir Hossain4Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna 9203, BangladeshDepartment of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna 9203, BangladeshDepartment of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna 9203, Bangladesh; Department of Mechanical Engineering, Iowa State University, Ames, IA 50011, USA; Corresponding author.Department of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna 9203, BangladeshDepartment of Mechanical Engineering, Khulna University of Engineering & Technology, Khulna 9203, BangladeshRecently, H2 enrichment for combustion and emission control in internal combustion engines, gas turbines, industrial boilers, and furnaces has been extensively studied. However, H2 enrichment for various inlet designs to change combustion characteristics has not yet been studied. In this study, the effect of hydrogen enriched air and methane non premixed combustion on dynamic flow behavior, temperature, pollutant emission are investigated in geometries with two distinct inlet arrangements using ANSYS Fluent CFD software. A reduced version of GRI-Mech 3.0 methane chemistry reaction including 19 species was used in the study. Hydrogen was added to methane fuel (CH4) at the inlet within the range 0∼50 % by mass while the mass flow rate of fuel is constant. The findings indicate that as the H2 enrichment increases, there is a noticeable shift in the peak temperature towards the fuel inlet. Additionally, the overall temperature of the combustion chamber remains homogenous indicating flame stability and consistent combustion in both geometries. The addition of 50 % H2 resulted in a reduction of approximately 37 % in the outlet temperature. Besides, H2 enrichment led to lower CO and CO2 emissions in both geometries, which is up to 99.99 % reduction in CO and 88.47 % reduction in CO2 for 50 % H2 addition. The lower emission of CO and CO2 could be attributed to the facts that with H2 enrichment the carbon content in the fuel stream decreases, mixture becomes leaner and subsequently results in more complete combustion. In both inlet configurations, the emission of NO exhibited a slight decrease upon the introduction of 15 % H2 but beyond 30 % enrichment there was a notable increase in NO production, primarily attributed to the peak temperature zones. In comparison, the second inlet arrangement has produced lower CO and CO2 emission than the first one, while the first inlet arrangement has resulted in overall lower NO emission.http://www.sciencedirect.com/science/article/pii/S2666202725000606CombustionFuelHydrogen enrichmentMethane-air reactionComputational fluid dynamics (CFD) |
| spellingShingle | Arithra Debnath Prithu Kazi Mostafijur Rahman Md.Rhyhanul Islam Didarul Hasan Saharaj Md Sabbir Hossain Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach International Journal of Thermofluids Combustion Fuel Hydrogen enrichment Methane-air reaction Computational fluid dynamics (CFD) |
| title | Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach |
| title_full | Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach |
| title_fullStr | Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach |
| title_full_unstemmed | Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach |
| title_short | Effects of hydrogen enrichment in Methane/Air combustion with different inlet arrangements: A numerical approach |
| title_sort | effects of hydrogen enrichment in methane air combustion with different inlet arrangements a numerical approach |
| topic | Combustion Fuel Hydrogen enrichment Methane-air reaction Computational fluid dynamics (CFD) |
| url | http://www.sciencedirect.com/science/article/pii/S2666202725000606 |
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